is that a taxonomist intends to write a magnum opus that provides an overview of the group, rather than a series of small papers. Another reason is that the code of nomenclature changes with time, and most changes have retroactive effect, which has resulted in some names becoming invalid that the author thought were validly published.

Historical development

Early versions of the International Code of Nomenclature (1958, 1966) explicitly defined a name as "a name which has been validly published,

1.Previous
3.Next